![]() Of course, you could go buy a SanDisk Connect Wireless or similar product, but what fun is that? Besides, being able to connect an SD card to your project opens up a lot of possibilities for data logging, configuration, and more. wants to change to the ESP32 and make some other changes to get better speeds. It sounds like a few design compromises led to the device being somewhat slow, although it looked usable. Starting from a few examples, he wound up providing an FTP server that you can connect to and send or receive files using that protocol. A 3.3 V regulator and an ESP12E board round out the hardware. The USB port is still there, but it is only for power. It all starts with the old trick of soldering a header to an SD card adapter. But made his own using an ESP8266 married to a card reader. You can find commercial USB sticks that can also connect via WiFi.
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